Just hit level 40 today, and maxed out conjuration and illusion. On top of that I am a bard, I've sacked a city and crushed a rebellion, and I run the god damn college of magic. Fuck yes.
So far all of the quest have been great, but I ran into a few that were just wonky and downright poorly done. One of the daedric quests was utter shit for me (started great, then it devolved into randomness. I left, came back later, and magically the quest just completed itself with me skipping a few steps - I didn't even know what was going on. The skin for this specific prince was also just a reused daedric lord skin, which sucks. I'm not sure why they didn't give Sanguine his own skin, they did for Sheogorath (who looks and sounds amazing by the way).
Another awful quest was the last mission for the east empire trading company in Whiterun. I'm not sure if the enemies were supposed to scale with me, but literally - me sending a companion & a daedric lord out to fight on my behalf while I nail the fucks from behind should not result in a five minute fight. It's was literally three on one and this low ranking bandit was not only holding ground, but sometimes winning. And this seaside castle was filled with these types of people. I had a bandit jump in the water, and while underwater fire lightning at me. I had an orc with a battle axe swim at me... ABOVE GROUND. There were a lot of glitches in that quest, and it really felt rushed/half-assed.
Other than those though, every quest has been great so far. I've literally pumped two days worth of time into this game, and I haven't even touched the main quest yet.
Thoughts:
God damn the bow is a beast in this game. Max out the damage perks, get the 3x stealth bonus for it, and watch people drop like fucking flies - and I haven't even gotten into the upper tier perks for the bow yet (which include a 50% chance to stagger instantly and paralysis).
As a non-armor wearing magic character, I have to say that it is damn hard to raise my one handed skill. It's gotten to the point where my x15 backstab with the dagger (plus +60%damage modifier for one-handed) isn't taking people down. In one of the missions I'll mention below, it barely took 15% of a guys life. It's like everything changed as soon as I hat the late 30's/40. Before people would succumb to my blade, and now in most special world areas that you can only get to via quest - it doesn't work at all.
I love how magic was implemented, but I really wish there were more spells in the game. The illusion tree literally feels like it has four spells (calm, fury, fear and invisible), and the conjuration tree eventually gets cluttered with dated spells. I haven't gotten to try the master level illusion spells yet, so hopefully there is something cool there. At the end of conjuration, I've found there are only two real summons that are used - the daedric lord and the storm atronach. Although the thrall version of the spells is cool, it gets burdensome for a sneaky character - one hit with anything and the beasts run amok. On top of that, they make a lot of noise- eventually you will get tired of the electricity and shifting lightning that surrounds those damn storm atronachs. Besides that though, every other summon is usually destroyed within seconds (sometimes the storm atro and the lord are too). I really wanted the dead thrall spell to be awesome. I mean, what's better than a permanent zombie? Problem is, half the people I want to raise can't be resurrected! Zombie giant? not on Bethesda's watch! Perma-zombie bandit leader? No way Jose, that guy was just way to powerful. Pitiful adept necromancer who died to one arrow in the shoulder? Sure, why not, not like I could use that spell on anything worth it.
Bound weapons area awesome, but I'm really surprised there was no bound dagger/boundwarhammer/etc. Bound bow is amazing, especially since it has its own spectral ammunition.
I like the armor in the game, and I'm glad that all these random bandits aren't all running around in daedric/dragon gear, but out of all the people I've killed, I haven't seen any bandits wear anything greater than fur or hide. Same thing goes for the mages in the game - it's always a black or blue robe. That sucks.
Sometimes dragon bones get caught in the world geometry and go spastic/batshit insane. Although it is awesome that they persist, it gets annoying when I'm walking around Solitude and there are three dragon skeletons trying to wave me down.
Dragon priests - fuck yes. I have two of your faces, I will get more!